1995 - JAMB Biology Past Questions and Answers - page 5
41
Some of the diseases caused by bacteria are
A
tuberculosis, gonorrhoea and syphilis
B
tuberculosis, gonorrhoea and AIDS
C
Poliomyelitis, syphilis and gonorrhoea
D
AIDS, cholera and tuberculosis
correct option: a
Users' Answers & Comments42
Environmental pollutants which can work through the media of water, soil and air include
A
carbon monoxide
B
noise
C
sulphur(IV)oxide
D
smoke
correct option: c
Users' Answers & Comments43
Human height is an example of a feature which depends on both
A
genotype and phenotype
B
genetic and environmental factors
C
mother's genotype and environmental factor
D
phenotipic and environmental factors
correct option: b
Users' Answers & Comments44
A person with type O blood can donate to a patient with type A because the donor's blood
A
lacks antigens
B
lacks anti-A antibodies
C
lacks anti-B antibodies
D
has both anti-A and anti-B antibodies
correct option: a
Users' Answers & Comments45
The DNA molecule is a chain of repeating
A
nucleosides
B
nitrogenous bases
C
sugar phosphates
D
nucleotides
correct option: d
Users' Answers & Comments46
The specific number of chromosomes in each somatic cell is represented by
A
2N
B
23
C
2N
D
N
correct option: c
Users' Answers & Comments47
A man with blood group a is married to a woman with blood group A. Which of the following group combinations is possible if the family has three children?
A
B, A, AB
B
O, A, B
C
B, AB, AB
D
A, O, A
correct option: d
Users' Answers & Comments48
The F1 of a cross between a tall and a dwarf plant was tall. The F1 was advanced to F2. How many of 120F2 plants will be dwarf?
A
30
B
60
C
90
D
120
correct option: a
Users' Answers & Comments49
All the sons of a colour-blind woman will be coloured blind regardless of the state of the father because
A
the egg determines the phenotype of the son
B
sons inherit the sex chromosome of their mothers
C
the father's sex chromosomes is weaker in sons
D
sex-linked traits express dominance in females
correct option: d
Users' Answers & Comments50
The slender, long and slightly curved beak of the sun-bird is an adaptation for breeding for feeding on
A
nectar
B
small seeds
C
big seeds
D
insects
correct option: a
Users' Answers & Comments